Trunk conduit



Patented Feb. 23, 1932 UNITED STATES PATENT oFFlcE HOHER L. ROGERS, `OFCINCINNATI, OHIO, ASSIGNOR TO THE PHILIP CAREY MANU- FACTURING COMPANY,A CORPORATION OF OHIO Application led October 19, 1927. Serial No.227,324.

My invention relates to trunking or conduits for carrying cables, signalWires and other lines of cables or Wires that it is desired to enclosefor protective purposes.

My invention is shown in the attached drawings in which:

Fig. l is a perspective view showing my conduit With the lid or topslightly elevated to more clearly show the same, and Fig. 2 is 19 a sideview ol" a modification. y In the drawings, A is the trunling or conduitproper, and B the cover for same. My improved conduit or trunking ismadeA `from a composition consisting of a homogeneous mass of bitumenand filler such as a brous liller or a mineral either granular orpulverulent or a combination of both granular and librous filler. In thepreferred form of my invention l mix With a minor proportion of 20 n. 1.r x bitumen, preferably asphalt oi' a suitabhl melting point preferablyone ranging from l5() deg. to 275 deg. F., a quantity of mineral eitherin the form oir' a pulverulent material ,L or a comparatively smallgranular material J or both in excess of the asphalt used and a fibrous:material in less proportion than the asphalt. l have found that asatisfactory mix may be made by using approximately 45 to per centmineral, to 40 per cent asphalt and the balance fibre. This material ismixed While the asphalt is heated until a homogeneous mass has beenformed and then beiore the mass has cooled and While in a plastic stateit is moulded under pressure to form my conduit which consists oi thebody A provided with the bottom l, the vertical sides 2, 2 and the topB. The top B is pro vided with a portion 3 in the form of a i tonguewhich projects down between the vertical sides 2, 2 of the body A so asto hold the top in lixed position on the body A. My conduit may be madehaving the body A and the top B ot the same length, or ifdesired one orthe other may be longer as shown for instance in Fig. 2 Where the top islonger than the body A and by reason of its being longer it will, whenlaid, hold the body A oi the various sections in alignment and in fixedposition With respect to each other by the nails l, 4 which may bereadily driven through the top into the body of my conduit. Thecharacter ot my conduit is such that nails or bolts may be readilyinserted into same Without fracture and such nails or bolts Will be heldlirmly therein because of the tenacious character of lthe material of myconduit. l also provide Where desired, doWels or nails or pinsconnecting the body portions A of adjacent conduits, which doivels orpins 5 are driven into openings 6 which may be preformed or may beormed'by the dovvels, pins, etc. in the body A. For some purposes ininstalling my conduit l apply to the adjacent ends ot' the bodies A, asolvent for the bitu minous materialor a coating of a bituminousmaterial so as to cement the adjacent body portions together and asimilar solvent or coating" may beapplied on the tops of theverticalsidc-ss 2, 2 or on theadjacent covers of the portion B or both,for the purpose of holding fthe cover in `adhesive engagement With thebody A ol my conduit.

Vhilefl'fhave stated the preferred method of making my conduit and thepreferred mix of the various materials, giving quantities thereof, I donot Want to be limited to such specific' combinations as minor changesmay be made Without departing from my invention. f

As will be readily seen from the foregoing, any number of the bodyportions A of my conduit may be laid, the cablesplaced therein and thenthe top or cover portion B attached to enclose the cables. lf it isdesired to remove, replace or repair cables, the cover may be readilyremoved for that purpose without removing the body portion A. It willalso be seen that by virtue of the character of my materials, my conduitmay be laid in the open or laid under ground if desired and it will forma waterproof conduit. Also al'ords electrical insulation and Will notdamage or affect the cables laid in it and in 'fact forms an insulationfor the cables against any elements that Would tend to allect or injuresame.

Claims: i

l. A conduit composed of a plurality ot' members 'formed` ot a tenacioushomogeneous mass of bituminous material and librous bituminous material,a mineral and a. iibrous material rendering said members penetrable bynails or the like without fracture.

3. A conduit composed of a plurality of members formed of a homogeneousmass of bituminous material, a pulverulent mineral and a fibrousmaterial whereby said members` may be and are cemented together bybituminous material and whereby said conduit is rendered electricallyinsulating, water-proof and air-tight.

4. A conduit consisting of a conductor re ceiving body and cover memberscomposed of bituminous material and filler material such that saidmembers may be and are secured together by effecting an adhesion betweenthe abutting surfaces of the members.

5. A conduit comprising a body portion composed of a tenacioushomogeneous mixture of bituminous material and a iiller includingVfibrous material, a cover for ksaid 'body portion, and nails driventhrough said cover into said-body portion uniting said cover and bodyportions, said material composing said body portion rendering said bodyportion penetrable by said nails without fracture.

6. A conduit as in claimr 5in which the contacting parts of the body andcover portions are cemented together by bituminous material. p Y' 7. Aconduit comprising a plurality of members composed of bituminousmaterial and a filler including iibrous material, whereby said membersmay be and arey cemented together by bituminous material.

8.. A conduit comprising a body portion and a cover therefor composed ofbituminous material and a filler including fibrous material, whereby thecontacting parts of said body and cover portions may be and are cementedtogether by bituminous material.

9. A conduit for cables and the like consisting of a plurality ofsections each having v a base portion and side portions extending fromsaid base portion and a cover for said conduit, said sections beingcomposed of bituminous material and a filler in such proportion ofbituminous material that the ends of adjacent portions of said conduitmay be and are cemented together by bituminous material. Y 10. A conduitcomprising a plurality of body and cover portions arranged end to endand formed of bituminous material and ii'll er material, includingfibrous material, whereby the contacting ends of said body and coverportions may be and are cemented together by bituminous material. i Y

11. A conduit composed of a plurality of ,members formed of ahomogeneous mass comprising about 45 to 55 per cent pulverulent mineral,8O to 40 per cent asphalt and the balance fibre.

V12. A conduit composed of a plurality of members formed of bituminousmaterial and a filler including brous material, the proportion offibrous material being less than that of the bituminous material.

13. A conduit composed of a plurality of membersformed of asphalt and afiller including ibrousmaterial, the proportion of fibrous materialbeing less than that of the asphalt.

14. A conduit composed of a body having a longitudinal opening, and acover for said opening composed of a homogeneous mass of bituminouslmaterial, a` mineral and a fibrous material, rendering said coverpenetrable by nails or the like without fracture.

15. A conduit composed of aV waterproof body having a longitudinalopening, and a cover for said openingcomposed of a homogeneous mass ofbituminous material, a min-` eral and a fibrous material, rendering saidcover penetrable by lnails or the like without fracture.

In testimony whereof, I have signed my name to this speciiication.

, HOMER L. ROGERS.

ico

